Undirected commercial break (6)
I believe the answer is:
adrift
'undirected' is the definition.
('adrift' can be a synonym of 'undirected')
'commercial break' is the wordplay.
'commercial' becomes 'ad'.
'break' becomes 'rift' (I've seen this before).
'ad'+'rift'='ADRIFT'
(Other definitions for adrift that I've seen before include "out of touch" , "Undirected" , "Off course" , "Moving aimlessly, unfastened" , "getting nowhere?" .)